How would I get Data stores working in a universe?

I have a Data store in my universe. I can't find a way to keep the currency the same from universe I really need help Thanks!

When having a StarterPlace connected to other places, this being called Universes, all Data stores are shared. Now, if you make a Data store in one place, you'll access it the exact same way with the same key in the other place. You need to make sure you're correctly changing values or whatever you're doing so it will be saved.

This is a link to Data stores so you can double-check